JPS5962512A - Cosmetic of pack - Google Patents

Abstract

PURPOSE:A cosmetic of pack having improved strength of film and drying properties, low permeability to water, easily relesable from the skin, containing unvulcanized synthetic rubber latex, polyvinyl alcohol, water-soluble polyhydric alcohol and/or oily component. CONSTITUTION:A cosmetic of pack containing 1-29wt% (preferably 10-25wt%) calculated as dried material of unvulcanized synthetic rubber latex, 5-15wt% polyvinyl alcohol, 2-10wt% water-soluble polyhydric alcohol (e.g., polyethylene glycol) and 2-10wt% oily component. The cosmetic has improved strength of film by the addition of the polyvinyl alcohol, improved storage stability, is capable of being coated uniformly, releasable easily without feeling pain.

Description

[Detailed description of the invention] The present invention has excellent strength and drying properties of the leather pattern, and
Until now, polyvinyl alcohol has been mainly used as the former base for polyvinyl alcohol, but it takes a long time to dry before it can be peeled off, and the film formed has a high moisture permeation rate, making it easy for moisture to be absorbed from the skin. It has the disadvantage that a sufficient moisturizing effect on the skin cannot be expected because it passes through the skin. As a method to improve this drawback, natural rubber or synthetic rubber latex is used as a coating agent, and vulcanized and sulfurized synthetic rubber latex with a high dry solids content is processed with a small amount of water-soluble polymer and surfactant. It is known to use pigment-added materials, but these have the advantage of fast drying time until peeling and slow moisture permeation rate, but when using natural rubber or synthetic rubber latex There are problems with stability when stored for long periods of time, and when unvulcanized rubber latex with a high dry solids content is added with a small amount of water-soluble polymer and pigment processed with a surfactant, the film strength is weak and may be damaged. There are problems with long-term storage stability. Also, when using these bases, dry skin+B>
does not dissolve easily in water, and has a practical problem in that the film that partially remains on the skin during use cannot be washed away with water.

The present inventors have overcome the drawbacks of the above-mentioned bases, formed a film that can be easily and uniformly applied, and can be peeled off in a short period of time.
As a result of intensive research aimed at creating a pack cosmetic that suppresses the scattering of water and gives the store a sense of firmness and has good storage stability, we have found that unvulcanized synthetic rubber latex is infused with polyvinyl alcohol. We have found that the objective 1) can be achieved by blending a polyhydric alcohol with a hydroxyl group of divalent or higher valence and/or each of the 11 components to make it easier to peel off from the skin, and have developed the present invention. I arrived at the eggplant.

That is, the present invention comprises (a) unvulcanized Q synthetic rubber latex of 1 to 29% by dry solid content, (b) polyvinyl alcohol, and (C) a water-soluble material having two or more hydroxyl groups in the molecule. The present invention provides a perfuming product characterized by containing a polyhydric alcohol and/or an oily component.

The unvulcanized rubber latex used in the present invention is, for example, polyisoprene latex, styrene-buccadiene latex, polybutadiene latex, or 10-25% by weight.
It is. When the economy reaches the 30's or above, the strength of the dried film becomes weak, and it is not strong enough to be peeled off evenly as a makeup product. In addition, it has poor storage stability and may cause aggregation during long-term storage. Furthermore, if only unvulcanized rubber latex is used as a base, the strength of the film is weak and storage stability is poor, and the viscosity is low, so when applied to the skin, it runs off and is difficult to apply uniformly. Therefore, it is necessary to add polyvinyl alcohol to increase the strength of the film, improve storage stability, and create a viscosity that makes it easy to apply on the skin. Polyvinyl alcohol versus unvulcanized rubber latte to achieve this purpose.

The blending ratio of dry solids in the rice cake is 1 to 0.15 to 4.
．． 0 (weight ratio).

In the present invention, for the purpose of increasing the stability of unvulcanized rubber latex, when a surfactant is added, the compatibility of unvulcanized rubber latex with polyvinyl alcohol deteriorates. It is not preferable to add it.

The polyvinyl alcohol in the present invention is preferably partially saponified with a degree of saponification of 85 to 90 mol%,
To this, completely saponified polyvinyl alcohol with a degree of saponification of 98 to 100 mol% is added to partially saponified polyvinyl Alfur nail 1
(not exceeding 1/2 of n) may be used in combination.

The content of polyvinyl alcohol is 1 to 20% by weight, preferably 5 to 15% by weight. If it is less than 1% by weight, the viscosity is too low to apply to the skin, and the storage stability is poor. Become. If it is less than 1% by weight, the viscosity is high and the skin is 1+
'J-1 becomes difficult to apply uniformly and G-coating.

(Hen, Senkane Shiro) In the present invention, a polyhydric alcohol and/or an oily component having two or more hydroxyl groups in the molecule is blended to make it easier to peel off the barrier film from the skin.

Examples of water-soluble polyhydric alcohols having two or more hydroxyl groups in the molecule include glycerin, diglycerin, glycerin,
Examples include sorbitol and polyethylene glycol. Formulation 11'C has a nail content of 05-15%, preferably 2-104% f. i'1%. 05 tun 111
% or less, the adhesive strength to the skin becomes too strong,
It becomes impossible to peel it off evenly from the skin lift. However, if the weight is less than J5, the drying rate of the film will be similar and the strength of the film will be weakened.

Oily components include, for example, animal and vegetable oils such as olive oil, nogum oil, and yang oil, and fats such as liquid paraffin and squalane.
Jj raw hydrocarbon oils, higher fatty acids such as meleic acid and isostearic acid, high-quality group 11 alcohols such as minor alcohol, instearyl alcohol, ester oils such as isostearyl myristate, and cetyl monomectate. Blend of oily ingredients: 1; is 05~”51
R accommodation%, preferably 2 to ]Oilt lit%. If it is less than 0.05% Ichikawa, the adhesive strength to the skin will be too strong, and the buttons cannot be attached uniformly from the skin. Also, 15
If it is more than 2% by weight, the strength of the film becomes weak and cannot be peeled off uniformly from the skin.

As mentioned above, the water-soluble polyhydric alcohol having two or more hydroxyl groups in the molecule and the oily component can be simultaneously blended into the permanent cosmetic. In that case, both components may be blended within the range of their respective blending amounts as specified in "-".

In addition, inorganic powders, fragrances,
Dyes, cosmetic medicinal effects, etc. can be added as appropriate.

The makeup cosmetic of the present invention has a white paste-like appearance when not colored, has good storage stability, is easy to apply evenly on the skin, dries at an appropriate speed, and has a smooth appearance after drying. It forms a transparent film and can be easily peeled off without causing any pain to the skin, giving the peeled skin 1+'7 a moderate sense of tension and a moist feel.

Examples are given below. All compounding ratios are 11'
)%.

(The following is a blank space) Examples 1 to 4 Polyvinyl alcohol in the amount shown in Table 1 (average polymerization q
2000, degree of saponification 89 mol%) and 3% polyethylene glycol 400 (average molecular weight 400) in pure water of the composition shown in the table below (l;゛) heated to 70°C to 90°C and dissolved with stirring.50'' C) to JJ, unvulcanized polyisobrene latex (dry b solid molecule b'4) in the amount shown in Table 1.
The packed polyvinyl alcohol of the present invention (average polymerization & 2000%) was mixed with stirring until homogeneous.
, degree of saponification 89 mol%) 15% and polyethylene glycol Comparative Examples 2 to 3 Using polyvinyl alcohol uncured polyisobrene latte with the blending amounts shown in Table 2, alcoholic beverages, and pure water, Table 2 Examples 1 to 3 The properties of Sample No. 4 and Comparative Examples \ to 3 are summarized in Table 3. Please note that coating properties and peelability are determined by a dedicated inspector]O
Judgment was made through actual human use. Film Strength As is clear from these results, when the unvulcanized polyisobrene latex of Comparative Example 2 has a high concentration, the film becomes weak and cannot be peeled off uniformly.

Furthermore, as shown in Comparative Example 1, the film formation time is slow unless unvulcanized polyisobrene latex is blended. Therefore, unvulcanized polyisozolene latte, Kusu σ) ':'/2
! l"l !'D 91rJ degrees -C1~2・shin
;) 1% is safe. 'ノ、< l1li t da IG
The first thing I noticed was that the feel after use was stable even after storage for 3 months and 6 months.

(Hereinafter, 1° margin) Example 5 Polyvinyl alcohol (average polymerization i 2000, degree of saponification 89 mol%) 0% to 55% pure water at 70°C to 90°C
Heat and dissolve at 10°C, add 5% liquid paraffin, cool to below 50°C, and stir and mix 30% unvulcanized polyisoprene latex (dry solids content: 6°C, 65%) until uniform. Thus, a skin care cosmetic of the present invention was obtained.

This pack Jjl: The viscosity is 24.500 cps
(30'C) - Spreads well when applied, forms a transparent film in 15 minutes, can be easily removed from the film η without feeling any pain, and gives a moist feel. Moreover, this barization rate was stable even after storage for 6 months.

Example 6 12% polyvinyl alcohol (average polymerization degree? saponification degree 89 mol%) and 2% glycerin were heated and dissolved in 63% pure water, 3% olive oil was combined and 50%
After cooling to below C, 30% of unvulcanized styrene-butane latex (dry solids content: 6°C, 55%) was stirred and mixed until homogeneous to obtain the bag cosmetic of the present invention.

This paste has a viscosity of 29. '700cps (30
``C) gives a smooth feel when applied.Also, this pa,
Rimeto F remained stable even after six months of maintenance.

Patent applicant: Shiseido Co., Ltd.

Claims (1)

[Claims] (a) Unvulcanized synthetic rubber latex with a dry solid content of 1~
29% by weight, (b) polyvinyl alcohol, (C) a water-soluble polyhydric alcohol having three or more water lv2 groups in the molecule, and/or an oily component.